Tetraphase headquarters are located within the Boston area’s bustling biopharmaceutical corridor.

From I-93 North
Follow signs to Boston and onto Southeast Expressway. Take exit for Storrow Drive and stay on Storrow Drive, which becomes Soldiers Field Road. Take the ramp towards Central SQ./MASS. PIKE (I-90). Stay straight through the 1st intersection and go to the 2nd intersection. Turn Left onto Western Ave, Western Ave becomes Arsenal St. Pass Watertown Mall (on your right) and Arsenal Mall (on your left). At the next light (Birch St.), turn right and follow the signs for 480 Arsenal St., which will be your first left turn after the sharp bend in the road. An entrance with the number 480 will appear directly in front of you, but veer past it and drive closer to our entrance about a hundred feet to the left.

From Mass. Turnpike (I-90) Eastbound from Route 95/128
Take exit 17. Follow Washington Street as it bears left toward Watertown. You will cross over the Pike and arrive on Galen Street. Follow signs for Watertown Square. At major intersection (Watertown Square), bear right onto US 20 (EAST). Don’t take the hard right; rather bear left almost immediately onto Arsenal St. Go through several traffic lights. Turn left onto Birch St. at the traffic light, and follow the signs for 480 Arsenal St., which will be your first left turn after the sharp bend in the road. An entrance with the number 480 will appear directly in front of you, but veer past it and drive closer to our entrance about a hundred feet to the left.

From Mass. Turnpike (I-90) Westbound from Boston
Take Exit 20 (Cambridge/Allston) and follow ramp down towards Allston. You will now be on Cambridge Street. Take a right on North Harvard Street (at the Hess Station). Turn left onto Western Ave, Western Ave becomes Arsenal St. Pass Watertown Mall (on your right) and Arsenal Mall (on your left). At the next light (Birch St.), turn right and follow the signs for 480 Arsenal St., which will be your first left turn after the sharp bend in the road. An entrance with the number 480 will appear directly in front of you, but veer past it and drive closer to our entrance about a hundred feet to the left.